- Sep 17, 2019
A basic limitation is you can't plug in an appliance inside a wall either: "Section 314.29 of the National Electrical Code (adopted in some form in most localities in the US) requires that all outlet boxes be accessible without removing any part of the building or structure. That includes wallboard."I guess light switches are an exception OK, every country has its specific laws. Here in Germany it wouldn't be a problem AFAIK, but, most German houses have solid walls, so in-wall speakers are not very popular here so far.